Scattered thunderstorms that dumped heavy rain moved through the area this morning and more storms are expected this afternoon.

During the rush-hour deluge, there were reports of high standing water on some streets and expressways, particularly in the southwest suburbs.

As of 7:30 a.m., flights in and out of O'Hare International Airport were being delayed 15 to 30 minutes and 100 flights had been canceled, according to the city's Department of Aviation. About a dozen flights were delayed by 45 minutes at Midway Airport, but there were no cancelations there.

This morning's storms covered virtually all of northern Illinois and northwest Indiana. The second phase will come this afternoon and last into the night for areas along and north of Interstate Highwway 80 across northern Illinois and northwest Indiana, the weather service said.

The storms deluged many parts of the south suburbs and South Side, with a weather observer near far south suburban Peotone recording almost 1.5 inches of rain in an hour and 10 minutes, and an observer southwest of Midway Airport reporting 1.3 inches of rain in half an hour, according to the weather service.

The chance of rain today is 70 percent. The high will be near 80. Tonight, there is a 20 percent chance of showers and thunderstorms.

On Tuesday, showers and thunderstorms are likely, mainly after 1 p.m., with the chance of precipitation also at 70 percent. The high will be near 90.

Wednesday there is a 50 percent chance of showers and thunderstorms, Thursday 40 percent and Friday 30 percent.

The high Wednesday will be in the upper 70s, on Thursday in the upper 60s and Friday around 70.